Pet shelter



FIG. 1 is a top right perspective view of a pet shelter showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevational view thererof, the left side being an identical image thereto;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a rear perspective view thereof. 

The ornamental design for a pet shelter, as shown and described. 